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deltachat-core/python/README.rst
2019-04-24 20:30:41 +02:00

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=========================
deltachat python bindings
=========================
This package provides bindings to the deltachat-core_ C-library
which provides imap/smtp/crypto handling as well as chat/group/messages
handling to Android, Desktop and IO user interfaces.
Installing pre-built packages (linux-only)
==========================================
If you have a linux system you may install the ``deltachat`` binary "wheel" package
without any "build-from-source" steps.
1. `Install virtualenv <https://virtualenv.pypa.io/en/stable/installation/>`_,
then create a fresh python environment and activate it in your shell::
virtualenv -p python3 venv
source venv/bin/activate
Afterwards, invoking ``python`` or ``pip install`` will only
modify files in your ``venv`` directory and leave your system installation
alone.
2. Install the wheel for linux::
pip install deltachat
Verify it worked by typing::
python -c "import deltachat"
Installing a wheel from a PR/branch
---------------------------------------
For Linux, we automatically build wheels for all github PR branches
and push them to a python package index. To install the latest github master::
pip install -i https://m.devpi.net/dc/master deltachat
Installing bindings from source
===============================
If you can't use "binary" method above then you will need
to `install the delta-core C-library <https://github.com/deltachat/deltachat-core/blob/master/README.md>`_ and then invoke installation of the source bindings::
pip install --no-binary :all: deltachat
.. note::
If you can help to automate the building of wheels for Mac or Windows,
that'd be much appreciated! please then get
`in contact with us <https://delta.chat/en/contribute>`_.
Code examples
=============
You may look at `examples <https://py.delta.chat/examples.html>`_.
Running tests
=============
Get a checkout of the `deltachat-core github repository`_ and type::
cd python
pip install tox
tox
If you want to run functional tests with real
e-mail test accounts, generate a "liveconfig" file where each
lines contains test account settings, for example::
# 'liveconfig' file specifying imap/smtp accounts
addr=some-email@example.org mail_pw=password
addr=other-email@example.org mail_pw=otherpassword
The "keyword=value" style allows to specify any
`deltachat account config setting <https://c.delta.chat/classdc__context__t.html#aff3b894f6cfca46cab5248fdffdf083d>`_ so you can also specify smtp or imap servers, ports, ssl modes etc.
Typically DC's automatic configuration allows to not specify these settings.
You can now run tests with this ``liveconfig`` file::
tox -- --liveconfig liveconfig
.. _`deltachat-core github repository`: https://github.com/deltachat/deltachat-core
.. _`deltachat-core`: https://github.com/deltachat/deltachat-core
Building manylinux1 wheels
==========================
Building portable manylinux1 wheels which come with libdeltachat.so
and all it's dependencies is easy using the provided docker tooling.
using docker pull / premade images
------------------------------------
We publish a build environment under the ``deltachat/wheel`` tag so
that you can pull it from the ``hub.docker.com`` site's "deltachat"
organization::
$ docker pull deltachat/wheel
The ``deltachat/wheel`` image can be used to build both libdeltachat.so
and the Python wheels::
$ docker run --rm -it -v $(pwd):/io/ deltachat/wheel /io/python/wheelbuilder/build-wheels.sh
This command runs a script within the image, after mounting ``$(pwd)`` as ``/io`` within
the docker image. The script is specified as a path within the docker image's filesystem.
The resulting wheel files will be in ``python/wheelhouse``.
Optionally build your own docker image
--------------------------------------
If you want to build your own custom docker image you can do this::
$ cd deltachat-core # cd to deltachat-core checkout directory
$ docker build -t deltachat/wheel python/wheelbuilder/
This will use the ``python/wheelbuilder/Dockerfile`` to build
up docker image called ``deltachat/wheel``. You can afterwards
find it with::
$ docker images
Troubleshooting
---------------
On more recent systems running the docker image may crash. You can
fix this by adding ``vsyscall=emulate`` to the Linux kernel boot
arguments commandline. E.g. on Debian you'd add this to
``GRUB_CMDLINE_LINUX_DEFAULT`` in ``/etc/default/grub``.